What is the difference between 35mm and other formats (large format, medium format)?
A 35 mm neg is 35mm wide * 24mm high. • Large format negatives are much larger, 4×5 (4 inches by 5 inches) or 8×10 (8 inches by 10 inches) for example. • Medium format negatives are somewhere in between, 6×4.5 (6cm by 4.5cm or 2 1/4 inches by 1 1/4 inches), 6×6 (6cm by 6cm or 2 1/4 inches square) or 6×7 (6cm by 7cm or 2 1/4 inches by 2 3/4 inches). • A 6×6 negative has about 4 times the area of a 35mm negative. • A 4×5 negative has about 4 times the area of a 6×6 negative, and an 8×10 negative has about 4 times the area of a 4×5 negative. An 8×10 negative has 64 times the area of a 35mm negative. • However, the film is the same, so the size of the grain in a 35mm negative enlarged to 8×10 would be significantly larger than an 8×10 negative enlarged (contact printed?) to 8×10.
